SEGMENT INFORMATION - Summarized financial information by segment (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Premium revenue									$ 515,506,266	$ 458,845,999	$ 416,402,313
Reconciliation of operating profit loss from segment to consolidated
Premiums earned									515,506,266	458,845,999	416,402,313
Underwriting profit (loss)									10,873,020	1,634,340	(63,661,191)
Net investment income									43,022,175	44,145,074	46,110,925
Net investment income (loss)									43,022,175	44,145,074	46,110,925
Realized investment gains									8,996,545	8,017,028	9,303,293
Other income									826,361	859,426	828,110
Interest expense									384,375	900,000	900,000
Other expenses									2,481,306	2,122,254	2,672,654
Income (loss) before income tax expense (benefit)	22,829,935	9,564,866	7,948,655	20,508,964	18,496,775	10,750,356	(5,511,804)	27,898,287	60,852,420	51,633,614	(10,991,517)
Reconciliation of assets from segment to consolidated
Assets	1,821,397,652				1,687,063,626				1,821,397,652	1,687,063,626
Eliminations	(441,983,975)				(396,288,097)				(441,983,975)	(396,288,097)
Reclassifications	(480,756)				(66,423)				(480,756)	(66,423)
Total assets	1,378,932,921				1,290,709,106				1,378,932,921	1,290,709,106
Property and casualty insurance [Member]
Segment Reporting Information [Line Items]
Premium revenue									392,718,848	357,138,686	321,649,215
Reconciliation of operating profit loss from segment to consolidated
Premiums earned									392,718,848	357,138,686	321,649,215
Underwriting profit (loss)									(10,435,392)	(8,207,255)	(46,387,960)
Net investment income									31,396,676	32,214,705	33,718,436
Realized investment gains									7,525,063	7,347,944	6,970,028
Other income									765,343	774,210	790,802
Interest expense									384,375	900,000	900,000
Other expenses									750,853	798,046	750,675
Income (loss) before income tax expense (benefit)									28,116,462	30,431,558	(6,559,369)
Reconciliation of assets from segment to consolidated
Assets	978,745,563				934,876,596				978,745,563	934,876,596
Eliminations	0				0				0	0
Reclassifications	0				0				0	0
Total assets	978,745,563				934,876,596				978,745,563	934,876,596
Reinsurance [Member]
Segment Reporting Information [Line Items]
Premium revenue									122,787,418	101,707,313	94,753,098
Reconciliation of operating profit loss from segment to consolidated
Premiums earned									122,787,418	101,707,313	94,753,098
Underwriting profit (loss)									21,308,412	9,841,595	(17,273,231)
Net investment income									11,634,972	11,940,123	12,395,350
Realized investment gains									1,471,482	669,084	2,333,265
Other income									61,018	85,216	37,308
Interest expense									0	0	0
Other expenses									366,338	24,829	591,850
Income (loss) before income tax expense (benefit)									34,109,546	22,511,189	(3,099,158)
Reconciliation of assets from segment to consolidated
Assets	387,284,346				350,867,500				387,284,346	350,867,500
Eliminations	0				0				0	0
Reclassifications	0				0				0	0
Total assets	387,284,346				350,867,500				387,284,346	350,867,500
Parent company [Member]
Segment Reporting Information [Line Items]
Premium revenue									0	0	0
Reconciliation of operating profit loss from segment to consolidated
Underwriting profit (loss)									0	0	0
Net investment income									(9,473)	(9,754)	(2,861)
Realized investment gains									0	0	0
Other income									0	0	0
Interest expense									0	0	0
Other expenses									1,364,115	1,299,379	1,330,129
Income (loss) before income tax expense (benefit)									(1,373,588)	(1,309,133)	(1,332,990)
Reconciliation of assets from segment to consolidated
Assets	455,367,743				401,319,530				455,367,743	401,319,530
Eliminations	(441,983,975)				(396,288,097)				(441,983,975)	(396,288,097)
Reclassifications	(480,756)				(66,423)				(480,756)	(66,423)
Total assets	$ 12,903,012				$ 4,965,010				$ 12,903,012	$ 4,965,010